Jake McGinty
9 years ago
committed by
Moxie Marlinspike
parent
f5724795cf
commit
1cc581aed8
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.thoughtcrime.securesms.components;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.support.annotation.AttrRes;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.view.View;
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public class DividerItemDecoration extends RecyclerView.ItemDecoration {
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private static final int DEFAULT_ATTR = android.R.attr.listDivider;
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private Drawable mDivider;
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private int mOrientation;
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public DividerItemDecoration(Context context, int orientation) {
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this(context, orientation, DEFAULT_ATTR);
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}
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public DividerItemDecoration(Context context, int orientation, @AttrRes int attr) {
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final TypedArray a = context.obtainStyledAttributes(new int[]{attr});
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mDivider = a.getDrawable(0);
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a.recycle();
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setOrientation(orientation);
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}
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public void setOrientation(int orientation) {
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if (orientation != LinearLayoutManager.HORIZONTAL && orientation != LinearLayoutManager.VERTICAL) {
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throw new IllegalArgumentException("invalid orientation");
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}
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mOrientation = orientation;
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}
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@Override
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public void onDraw(Canvas c, RecyclerView parent) {
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if (mOrientation == LinearLayoutManager.VERTICAL) {
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drawVertical(c, parent);
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} else {
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drawHorizontal(c, parent);
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}
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}
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public void drawVertical(Canvas c, RecyclerView parent) {
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final int left = parent.getPaddingLeft();
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final int right = parent.getWidth() - parent.getPaddingRight();
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final int childCount = parent.getChildCount();
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for (int i = 0; i < childCount; i++) {
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final View child = parent.getChildAt(i);
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final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
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.getLayoutParams();
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final int top = child.getBottom() + params.bottomMargin;
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final int bottom = top + mDivider.getIntrinsicHeight();
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(c);
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}
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}
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public void drawHorizontal(Canvas c, RecyclerView parent) {
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final int top = parent.getPaddingTop();
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final int bottom = parent.getHeight() - parent.getPaddingBottom();
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final int childCount = parent.getChildCount();
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for (int i = 0; i < childCount; i++) {
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final View child = parent.getChildAt(i);
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final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
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.getLayoutParams();
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final int left = child.getRight() + params.rightMargin;
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final int right = left + mDivider.getIntrinsicHeight();
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(c);
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}
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}
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@Override
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public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
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if (mOrientation == LinearLayoutManager.VERTICAL) {
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outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
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} else {
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outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
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}
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}
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}
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